Deck 27: Battery Service

Question 1

Which of the following statements is LEAST-Likely true?

A)A battery gives off hydrogen as it is recharged.
B)Sparks, flames, and cigarettes must be kept away from batteries.
C)Wear eye protection when working around batteries.
D)Disconnect the battery charger while it is turned on.

Answer 1

D

Question 2

A(n) ____________________ compares the weight of a liquid to the weight of pure water.

Answer 2

hydrometer

Question 3

If a battery that is in good condition continually goes dead, there may be a circuit that is causing the drain when everything is supposed to be off. This is MOST-Likely referred to as:

A)surface charge
B)parasitic load
C)carbon pile
D)lead oxidation

Answer 3

B

Question 4

All of the following statements are true EXCEPT:

A)new batteries with cell caps are sometimes shipped dry, requiring the addition of electrolyte.
B)electrolyte, which is approximately 75% acid and 25% water (by volume), is shipped in a large plastic bag inside a sturdy cardboard box.
C)after filling a dry battery, allow it to sit for at least 15 minutes so that the plates can soak up the electrolyte.
D)concentrated acid can damage your eyes, burn skin, and destroy clothes.

Question 5

A battery with a state of charge of 65% or more is considered "charged."

Question 6

While having a discussion, Technician A says that a sulfuric acid smell and/or boiling electrolyte indicates that a battery is being charged too fast. Technician B says that electrolyte boiling is not an indication of a problem. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 7

Battery service includes replenishing water (except on no-maintenance batteries) and service to the terminals and clamps.

Question 8

Which of the following statements is LEAST-Likely true?

A)A slow charge is easiest on the battery.
B)During a slow charge, the charging rate is between 10 amps and 25 amps.
C)A battery is fully charged at the end of a slow charge when its specific gravity does not climb higher during two checks with a hydrometer, done 1 hour apart.
D)Following a recharge, if the difference between hydrometer readings taken from different cells is more than 0.050, the battery should be replaced.

Question 9

____, which looks like white powder on and around battery posts, sometimes happens when battery gas escapes up the terminal post from inside the case.

A)Corrosion
B)Electrolysis
C)Sulfation
D)Battery holddown

Question 10

Modern ammeters often use a(n) ____ to sense the amount of current flowing through the cable or wire.

A)surface charge
B)carbon pile
C)parasitic load
D)inductive pickup

Question 11

When a battery will not accept a charge, it is MOST-Likely:

A)dry
B)fully charged
C)sulfated
D)corroded

Question 12

There are two causes of increased resistance at cable connections: ____________________ and air.

Question 13

While having a discussion, Technician A says that a battery that is at least 3/4 charged is in no danger of freezing. Technician B says that the battery has to be at least 90% charged. Who is correct?

A)A only
B)B only
C)A and B
D)Neither A nor B

Question 14

A(n) ____________________ is when there is a high rate of current for a short period.

Question 15

Whether a cable is to be repaired or replaced, it must remain long enough after installation to permit enough slack for the engine to be able to freely rock on its mounts.

Question 16

Resistance at the cable connections is a major cause of starting system problems.

Question 17

When a battery is low on water, it has very little internal resistance.

Question 18

All of the following statements are true EXCEPT:

A)when a vehicle is left for a month at a time without being started, its battery is still being discharged by loads that are present while the key is off.
B)a battery that is only half charged can often start an engine during warm weather.
C)the battery load test, also called a heavy load test, is a battery capacity test that can be done to a battery with at least a 65% state of charge.
D)a volt-amp tester, or VAT, is used by some shops for the battery load test.

Question 19

A(n) ____________________ voltage charger reduces the amount of charging current while maintaining the output voltage at the same level as the battery reaches its full charge.

Question 20

____________________, which does not conduct electricity, will reduce or stop the flow of current between the battery and the vehicle's electrical system.

Question 21

How would you save a sulfated battery?

Question 22

What are the steps involved in jump starting a vehicle?

Question 23

What precautions should you take when jump starting a vehicle?

Question 24

How would you test battery capacity without a carbon pile VAT (volt-amp tester)?

Question 25

When determining a battery's condition, what items should you look at?